{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Practical radar navigation;: A manual in anti-collision and terrestrial radar navigation and a practical system of direct radar plotting","author_name":"Christian Hengst","thumbnail_url":"https://www.ebooknetworking.net/books/noimage.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B0007I1I92.html\">Practical radar navigation;: A manual in anti-collision and terrestrial radar navigation and a practical system of direct radar plotting</a>","width":400,"height":300}